Furnace.



vNo. 724,974.

- PATENTED APR, 7, 1903. A. J. VAUGHAN.

PURNACE.

APPLICATION FILED MAR. 14, 1902.

2 SHEETS-SHEET l.

L rv

PATENTED APRJ 7,l 1903.

A. J'. VAUGHAN.

7 FURNACE.

APPLICATION FILED MAR. 14, 1902.

2 SHEETS-SHEET 2.

' Ho MODEL.

Inf/Mrs MW] my@ r3 r f nwo., WASHINGTON u c ans Ormea.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 724,974, dated April '7, 1903. Application filed March 14,19Z. Serial No. 98.247. (No model.)

To @il zuwm it may concern:

Be itknown that I, ARTHUR J. VAUGHAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illi-4 under conditions intended to insure perfect` combustion.

My invention is illustrated inthe accompanying drawings, in which- Figure l represents a longitudinal sectional view of myimproved furnace; Fig. 2, a transverse section taken as indicated at lines 2 of Fig. l, and Fig. 3 a perspective sectional view showing one of the retorts employed.

A represents a boiler of a furnace; B, a bridge-Wall thereof; C, a smoke-stack with whichy furnaces are usually provided; D, a chamber which corresponds with the lirechamberof the ordinary furnace; E E', retort-s located in the chamber D; F, a smoke-return flue which divides into branches F F2, communicating with the retorts E E', respectively; G, a receptacle for pulverulent fuel provided with a discharge-chute G', which connects through branch pipes G2 G3 with the passages F F2 adjacent to the retorts E E'; H, an endless link chain or link belt; I, a conduit communicating with the passage G, and I' a fan for supplying air to the furnace under such pressure as may be required.

The retorts comprise hollow bodies of somewhat oval cross-section, the bodies of the retorts being imperforate and the ends supplied with a series of perforations. As shown in Fig. 3, each retort has one hinged end a, through which Waste or other inflammable material may be introduced for starting the fire. The passages F F2 communicate with the lower portions of the retorts at the front side thereof, so that when the air-current carrying the powdered fuel enters the retort a whirling movement is produced. Combustion takes place Within the retorts and flames shoot from the ends of the retorts, the combustion being completed in the chambers beneath the boiler and in the flues of the boiler. Where the combustion is incomplete, the gases return through the passage F to pass again through the retorts.

The retort-s may be supported in any suitable manner and where employed in connection with the old type of boiler may rest upon the grate, as indicated in the drawings.

I have shown the chimney C provided with a balanced damper K, which is self-adjusting, according to the pressure upon it. Normally when there is no pressure upon it it assumes a horizontal position.

As shown, the chain H is supported upon sprocket-wheels having their axes below the level of the floor of the hopper G, one portion of the conveyer-chain passing above the floor of the hopper and the other portion beneath said floor. The conveyer-chain may be suitably geared to be operated from the source of power which operates the fan.

The operation will readily be understood. In starting the furnace lire is introduced into the retorts in any desirable manner, as by introducing waste or other inflammable material and setting fire to the same. The fan and conveyer-chain are operated from any suitable source of power, the fan producing a current which carries the fuel (usually pulverized coal) through the passage G and branch passages G2 into the retorts. As the fuel enters the retort it impinges against the highly-heated rear walls of the retorts, and a whirling movement is produced, resulting in an intimate iutermingling of the fresh fuel with the burning particles, as Well as reduction of the fuel by mutual attrition of the particles. As the ames or tongues of lire shoot from the adjacent ends of the retorts they meet and are deflected upwardly to the boiler. The outer ends of the rctorts are sufficiently removed from the walls of the furnace to prevent injury thereto.

The usual ash-pit is commonly provided, as Well as ash-pit doors, and where desired air may be admitted through the ash-pit.

It readily Will be understood that only one retort may be employed or that any number of retorts may be employed, according to the size of the furnace.

Changes in details of construction within IOO the spirit of my invention may be made. Hence no undue limitation is to be understood from the foregoing detailed description.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a furnace, the combination of a suitable chamber, a retort therein provided with an imperforate body and perforate ends, a smoke-stack, suitable flues and return-lines leading from said smoke-stack, a fuel-supply chamber for pulverulent fuel, a passage lead-` ing from the fuel-supply chamber to the retort, means for conveying pulverulent fuel to said passage, and means for producing an air-current through said passage, substantially as described.

2. In a furnace, the combination of a boiler, achamber beneath said boiler, a transverselydisposed retortin said chamber provided With an im perforate body and With perforate ends, a return-Hue from the boiler discharging into said retort at the front side thereof, a fuelchamber, a passage leading therefrom and communicating with the retort, means for supplying fuel to said passage, and means for producing an aircurrent through said passage.

3. In a furnace, the combination of a suitable chamber, a retort of substantially oval cross-section therein, having an imperforate body and perforate ends, a combined air and fuel duct leading to said retort and having 1 tangential communication therewith, means 4With said flues, a retort Within said fire-cham;

ber, a return-due communicating With said retort, a combined air and fuel duct leading to said retort, means for supplying pulverulent fuel to said duct, and means for producing an air-current through said duct.

5. In a furnace, the combination of a firechamber, two retorts Within said ire-cham ber provided with perforate adjacent ends, a smoke-stack, iiues leading from the fire-chamber to said smoke-stack, return-filles communicating with said smoke-stack, ducts leading to said retorts, means for supplying pulverulent fuel to said ducts and means for producing an air-current through said ducts.

6. Ina furnace, the combination of a firechamber, a retort therein com municating With said fire-chamber, a duct for supplying pnl'- verulent fuel and air to said retort, a die rect due, a return-flue, a chimney incommunication with said return-flue and said direct ue, and balanced damper for said chimney, substantially as described. f

7. In a furnace, the combination of a boiler provided with suitable fines, a smoke-pipe, a fire-chamber beneath said boiler, a iiue leading from said fire-chamber to said smoke-pipe, two retorts Within said fire-chamber in alinement with each other and provided-With perforate ends, a' return flue communicating with said retorts and with said smoke-pipe, a fuel-chamber, a fuelconveyer, ducts leading from said conveyer to said retorts, and means for supplying air under pressure to said ducts.

ARTHUR J. VAUGHAN.

In presence of- ALBERT D. BACCI, W. B. DAVIEs. 

